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Molded Case Circuit Breaker

For circuit breaker systems in commercial and industrial facilities, molded case circuit breakers are among the most widely used components for reliable overcurrent protection and electrical distribution. Molded case circuit breakers provide automatic circuit interruption during overload or short circuit conditions, protecting electrical systems and equipment from damage while enabling manual switching control. Electrical.com carries an extensive selection of molded case circuit breakers from all major manufacturers, including new, used, surplus, and re-certified options. These components are designed to meet the diverse needs of commercial buildings, manufacturing facilities, data centers, and industrial power distribution applications.
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Part Number
PRICE
Manufacturer
Amperage
Voltage
M2S225T3L
M2S225T3L
Limited Stock
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Noark Electric
225
600
M3N400T3L
M3N400T3L
Limited Stock
From
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Noark Electric
400
600
M3S400T3L
M3S400T3L
Limited Stock
From
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Noark Electric
400
600
M4N400T3L
M4N400T3L
Limited Stock
From
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Noark Electric
400
600
M4N600T3L
M4N600T3L
Limited Stock
From
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Noark Electric
600
600
B1N1D5
B1N1D5
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Noark Electric
5
240
M1N20T3
M1N20T3
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From
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Noark Electric
20
600
M1N25T3
M1N25T3
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Noark Electric
25
600
M1N50T3
M1N50T3
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Noark Electric
50
600
M1N80T3
M1N80T3
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Noark Electric
80
600
M1S100T3
M1S100T3
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Noark Electric
100
600
M1S80T2
M1S80T2
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Noark Electric
80
600
M2N200T3
M2N200T3
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Noark Electric
200
600
M2S200T3L
M2S200T3L
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Noark Electric
200
600
M3N350T3L
M3N350T3L
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Noark Electric
350
600
M3S350T3L
M3S350T3L
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From
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Noark Electric
350
600
M3S400T2L
M3S400T2L
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From
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Noark Electric
400
600
B1E1B2
B1E1B2
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Noark Electric
2
277
B1E1B6
B1E1B6
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Noark Electric
6
277
B1E1C20
B1E1C20
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Noark Electric
20
277
B1E1P100
B1E1P100
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Noark Electric
100
277
B1E1P125
B1E1P125
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Noark Electric
125
277
B1E2C32
B1E2C32
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Noark Electric
32
480
B1E2D10
B1E2D10
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Noark Electric
10
480
Popular Molded Case Circuit Breaker Manufacturers

Electrical.com stocks the largest inventory of molded case circuit breakers in the world, with over 1 million square feet of new, used, surplus, and re-certified MCCBs available for immediate shipment. From standard thermal-magnetic breakers to electronic trip units across all amperage ratings, we have what you need when others say no. Our comprehensive molded case circuit breaker inventory spans all voltage and current ratings, frame sizes, and interrupting capacities from all major manufacturers including current production and discontinued models from legacy suppliers. Available in new factory condition, surplus stock, and re-certified options‚ All backed by our standard 2-year Electrical.com warranty. Our molded case circuit breakers serve critical applications across commercial buildings, industrial facilities, manufacturing plants, data centers, healthcare facilities, distribution panels, motor control centers, switchboards, and power distribution systems.


Whether you're maintaining legacy equipment with obsolete MCCB models or sourcing current production breakers for new installations and retrofits, our 40+ warehouse locations across the US and Canada ensure rapid delivery to minimize your downtime. Need molded case circuit breakers now? Call 877-999-7077 or email [email protected]. With same-day shipping available and the right parts ready to ship from our nearest warehouse location, Electrical.com gets your operations back online fast. We can say yes when others have to say no.